Toy plastic molding set



April 5, 1949. R. FRlEsTl-:DT ET AL.

TOY PLASTIC MOLDI'NG SET 2 Sheets-Sheet l Filed OCT.. l1, 1945 5W rs mf I e w M f w April 5, 1949. R. FRIESTEDT ET AL 2,466,497'

` TOY P LAsTIc MOLDING SET Filed oct. 11, 1945 l 2 sheets-sheet 2 rra@ N554 Patented Apr. 5, 1949 UNITED TOY PLASTIC MQLDING SET Ragnar Friestedt and Raymond C. Halfer, Chicago, lill., assignors to Halter Engineering Company, Chicago, Ill., a firm Application October 11, 1945, Serial No. 621,764

Claims. (Cl. 18-17) l 3 Our invention relates to improvements in plas- Fig. 11 is a side elevational view of several of tic molding apparatus. the presses positioned upon a single heating ele- Our invention relates more particularly to a ment to illustrate the manner in which a pluplastic molding set by the use of which an ordirality of objects may be molded at the same time.

nary layman or child will be capable of molding 5 In the embodiment of the invention which we plastic parts by a simple process that is easy to have chosen to describe, and which is illustrated understand and which is easily learned. in the drawings, in Fig. 1 We have ShOWn a heat- The principal object of our invention is to proing element l@ Whieh may be 0f any desired type, vide an improved construction of plastic molding having a flat upper platform l2, suitable support apparatus constructed of a comparatively few members i4 and heating DOStS i@ Whieh may be parts which are simple in construction and which connected by an eleCtIiC Conduit t0 any Suitable apparatus is simple to use and operate so that SGU-ree Of eieetlieity. the apparatus can be adapted as a molding set We provide a pail 0f POStS i3 in spaced Telafor children in the nature of a toy or it may also tion DOSitiOned Orl the tOp i2 0f the heating elebe used by model makers, inventors or others in ment lil. These posts are prOVided f01 the D111- the production of commercial plastic articles. pose of positioning and locking the press frame A further object of the present invention is to upOrl the heating unit i0, the baSe 22 0f the provide an improved plastic molding set or appress frame being formed with the arcuate slot paratus whereby the platens or dies are remov- 2li and the cutaway Dertien 26, S0 that. by DOS- able and interchangeable so that an ordinary 20 tiollirlg the arcuate gIOOVe 2@ against the Shank layman or a child may remove and replace the Of One 0f the DOStS i8 and the eiltaWay DOItiOIl dies or platens whenever a dilerent design or 26 against the other 100St i3, the PIeSS frame iS shape oi molded articles is desired. rigidly positioned on the heating element l0.

A further object of the invention is to provide ,W The plastic Dress may comprise the frame a construction of plastic molding apparatus so member 2K1, as described, provided with the base constructed that a new and improved process of POItiOIi 22 and a Dai!` 0f Side frame members 23 molding may be accomplished by the use of the and 3D terminating in an arcuate cross member same. 32 which is formed with an upwardly extending Other objects and advantages will be more aphub pOltiOIl 34 A pail 0f kilOCk-Ollt DinS 35 are parent from the following description wherein positioned in the side members 28 and 30 for a reference is had to the accompanying two sheets purpose which will be presently described. The of drawings upon which: hub 3@ may be suitably tapped to receive a pres- Fig. 1 is a side elevational View of our irnsure screw member 3S which is provided at its proved molding set and heater; upper end with a cross bar l0 that terminates Fig. 2 is a plan view of the same parts; 35 in a pair of handle portions l2 and 44. A re- Fig. 3 is a plan sectional View through the plasduced shank 46 of the screw 38 extends through tic press taken generally on the lines 3-3 of an opening in the top platen holder 48 so that Fig. 1; it may be rotatably connected thereto, the head Fig. 4 is a side elevational view of the well ring; being peaned over to connect the holder and the Fig. 5 is a plan view thereof; 40 screw together. Fig. 6 is a cross sectional view of the upper The holder 48 is adapted to carry the upper platen or die; platen or die 50, the same being connected there- Fig. 7 is a bottom plan view thereof; to by a pair of screw members 52. The lower Fig. 8 is a cross sectional View of the lower platen 5@ is supported from the base 22 of the platen or die; press and connected thereto by suitable screw Fig. 9 is a plan View thereof; members 55. We provide a Well ring 58 which is Fig. 10 is a plan View of an article of manufacadapted to be loosely positioned about the lower ture such as a decorative button, poker chip or platen or die 54 and resting upon the base 22 of similar article which has been made with the dies the press member 20.

shown in the drawings. When it is desired to make an object such vas the article 6@ shown in Fig. 10, a determined quantity of plastic in granules, is poured into the well ring 53 and the press as a unit is fastened on the heater I0. After the material is in the press the pressure screw is turned down until the top platen touches the material. Then the screw is turned very slowly applying slight pressure to allow for the melting of the material. This ordinarily takes from one to one and one-half minutes after which the upper platen may be screwed down until a positive stop is felt, at which time the plastic material will have completely filled the impression in the platens or dies so that the object to be molded will conform to the configuration of the dies.

The press should be left in this condition on the heater for about three minutes after 'which the press may be removed from the heating platen and put under a water faucet with a light stream of water to cool off the press. The press may also be dipped into a shallow pan of water or other similar cooling medium which is available. When the platens have been suiiiciently cooled the pressure screw may be turned in an upward direction, with the result that the upper platen will be withdrawn and the well ring 58 will follow until it reaches the knock-out pins 3S, at which time the ring will be moved away from the upper platen and the plastic article that has been molded can then be removed. The press unit as a whole may be moved around by means of the handle member B4 which is rigidly connected to the press frame 20 and ext-ends to one side thereof.

From the above and foregoing description it can be seen that both the construction provided and the method f operation are comparatively simple, so that model makers or laymen and children are capable of employing our improved press with excellent results, are interchangeable and any desired configuration or shape `within limits can be provided in the dies so that articles of any shape can be produced.

In the platens i] and 54 we have provided a construction wherein a disc or circular article, such as a poker chip or decorative pin, has been produced with a raised star member S shown thereon. It is, of course, obvious that configurations may be provided upon both sides of the molded article and the shape or outline may be varied, as desired, depending upon the die construction entirely.

In Fig. 11, we have illustrated a plurality of press members 2i! positioned upon a comparatively long heating element l il-a, it being understood that the heating element may not necessarily be an electric heater. The press may be positioned directly over the gas flame of a gas stove; it may be placed upon a coal stove or any other heating medium that is convenient.

While we have illustrated and described a specific embodiment of the invention, it will be apparent to those skilled in the art that changes and modifications may be made in the exact details shown and we do not wish to be limited in any particular; rather what we desire to secure and protect by Letters Patent of the United States 1s:

1. Apparatus of the class described including a heating element having a flat upper surface, a pair of posts positioned thereon, a frame inember having Vertical side walls and a base with notches to engage said posts to position said frame on said heating element, knock-out pins in the side walls of said frame, a vertically disposed The platens or dies i f pressure screw mounted in said frame, an upper platen carried thereby, a lower platen secured to the base of said frame and a well ring surrounding said lower platen whereby plastic granules may be poured into the same, the platens fastened together and a plastic article molded therein, said knock-out pins adapted when said upper platen is raised to separate the well ring therefrom.

2. Apparatus of the class described including a heating element having a liat upper surface, a pair of posts positioned therein, a U-shaped frame member having a base with notches to engage said posts to position said frame on said heating element, the upper end of said frame member having a tapped boss therein, a vertically disposed pressure screw mounted in said boss, an upper platen carried thereby, a lower platen secured to the base of said frame and a well ring surrounding said lower platen whereby plastic granules may be poured into the same, the platens fastened together and a plastic article molded therein and knock-out pins in the sides of said U-shaped frame member for separating the well ring from the upper platen when the upper platen is raised.

3. Apparatus of the class described including a U-shaped frame member having a circular base portion, a centrally aligned vertical tapped boss therein above said base, a vertically disposed pressure screw mounted in said boss` an upper platen carried thereby, a lower platen secured to the base of said frame member and a well ring surrounding said lower platen whereby plastic granules may be poured into the same, the platens fastened together and a plastic article molded therein and knock-out pins in the sides of said U- shaped frame member for separating the upper platen from the well ring when the upper platen is raised.

4. Molding apparatus comprising a base adapted for placement on a hot plate or the like, a stationary platen, devices for attaching the stationary platen to and in a predetermined position on the upper surface of the base, a stem carrier xed to and rising from the base to overlie the aforementioned predetermined position on the base, a stem supported and guided by that portion of the carrier which overlies such predetermined position, said stem being longitudinally movable toward and away from such predetermined position, a movable platen carried by the stem in opposition to the stationary platen, a wel] rim, into which the movable platen may descend, placeable on the upper surface of the base in circumscribing relation to the fixed platen, and knock-out members presented by the stem carrier and lying in the path of the well rim to separate the well rim from the movable platen during travel of the movable platen upwardly away from the stationary platen.

5. Molding apparatus comprising a base adapted for placement on a hot plate or the like, devices for attaching a stationary platen to and in a predetermined position on the upper surface of the base, a stem carrier fixed to and rising from the base to overlie the aforementioned predetermined position on the base, a stem supported and guided by that portion of the carrier which overlies such predetermined position, said stem being longitudinally movable toward and away from said predetermined position, devices for mounting a movable platen on the stem in opposition to a stationary platen attached to the base, a Well rim into which may descend a movable platen mounted on the stem, said well rim being arranged and adapted to be carried by the base in circumscribing relation to a fixed platen carried thereby, and abutment means presented by the stem carrier and lying in the path of the Well rim to separate the well rim from a movable platen mounted on the stem during travel of such movable platen upwardly away from a stationary platen attached to the upper surface of said base.

RAGNAR FRIESTEDT. RAYMOND C. HALFER.

REFERENCES CITED The following references are of record in the file of this patent:

Number UNITED STATES PATENTS Name Date Hyatt, Jr., et a1 Dec. 5, 1871 Cooke Apr, 22, 1873 Winn and Bliss Jan. 15, 1878 Villiers Nov. 2, 1880 Boch May 22, 1894 Davies July 22, 1924 Scribner July 4, 1933 Burke May 22, 1934 Person Aug. 7, 1834 Villanyi Feb. 5, 1935 Handler Dec. 14, 1937 

